The function of the internal plugin
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The benefits of the internal insert: First, it improves heat transfer efficiency; second, it reduces the accumulation of dirt inside the heat exchange tubes； Third, reduce the pressure drop loss in the tube side. Benefits in terms of economic indicators: First, it reduces the cost of purchasing one-time use heat exchangers ； Secondly, saving the overhead power consumption means saving electricity ； Thirdly, the heat exchanger has a small size and light weight, which reduces maintenance costs ； Fourth, delaying scaling in the tube side can extend the maintenance period. Suitable for liquid-liquid heat transfer, gas-liquid heat transfer, gas-gas heat transfer, condensation, freezing, temperature cross-over, heat transfer with small temperature differences, and conditions of high viscosity and low flow rates.
Treatment of complex problems: 1. Inserting internal components into the heat transfer tubes to address the issue of insufficient outlet temperature. 2. For scaling in the shell side of the heat exchanger, spiral baffle plates are used; at the same time, the flow velocity in the shell side is increased to reduce the heat exchange area. 3. Welding at the tube ends of the evaporator and waste boiler tube sheet has occurred; protection for these tube end areas should be added, and a distributor should be installed at the inlet of the tube box. 4. For applications that require efficient heat exchangers, both insert pieces and spiral baffles are used simultaneously. 5. Preventing erosion and scouring through mechanical means, as well as designing tiny pipe openings to reduce system pressure drops. 6. Corrosion protection and impact resistance modification for the dryer ； Modification of reaction vessels to prevent centrifugal wear ； Low-temperature anti-freezing insert. 7. Optimization of the circulating water system: Consideration of pressure drop losses in the circulating water ； Factors of design margin ； Scaling curve ； Requirements for circulating water based on heat exchanger type (different flow rates required) ； The difference between batch processing and continuous processing ； The impact of water quality on system balance. It is necessary to set the correlation coefficient.
Applicable operating conditions and related requirements: First scenario – the liquid phase is in the tube side; in most cases it is a coolant, while the shell side consists of a condenser with a relatively clean material that undergoes phase change. When the flow rate in the tube side is high and a larger pressure drop is acceptable, using an abD-type low-speed heat exchanger equipped with eleven inserts can reduce the heat exchange area by more than 35%. Second case: When both the fluid in the tube side and that in the shell side are in liquid phase with no phase change, HTRI is used to calculate the tube-side heat transfer coefficient α_i, while HTRI is also used to calculate the shell-side heat transfer coefficient α_o. 1) When α_i/α_o
This will not cause any blockage
This will not cause any blockage
Do the plugins actually reduce voltage drop losses?
It reduces the heat exchange area while improving the heat exchange efficiency.